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Related Experiment Videos

Endogenous gonadal hormone exposure and bone sarcoma risk.

Dawn M Cooley1, Benjamin C Beranek, Deborah L Schlittler

  • 1Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, Indiana 47907, USA.

Cancer Epidemiology, Biomarkers & Prevention : a Publication of the American Association for Cancer Research, Cosponsored by the American Society of Preventive Oncology
|November 16, 2002
PubMed
Summary

Early gonadectomy in Rottweiler dogs significantly increases bone sarcoma risk. Dogs neutered before one year old face a one in four lifetime risk, highlighting the influence of sex hormones on cancer development.

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Area of Science:

  • Veterinary Oncology
  • Comparative Oncology
  • Endocrinology

Background:

  • Endogenous sex hormones are suspected to influence bone sarcoma development.
  • An appropriate animal model is needed to test this hypothesis.
  • Rottweiler dogs are prone to appendicular bone sarcomas and undergo elective gonadectomy.

Purpose of the Study:

  • To investigate the association between endogenous sex hormones and bone sarcoma risk in Rottweiler dogs.
  • To determine if gonadectomy influences the incidence of bone sarcoma.
  • To utilize Rottweilers as a model for studying osteosarcoma in humans.

Main Methods:

  • Historical cohort study of 683 Rottweiler dogs in North America.
  • Data collected via owner questionnaires.

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  • Analysis of relative risk and hazard ratios based on lifetime gonadal hormone exposure and age at gonadectomy.

    • Main Results:

    • Bone sarcoma diagnosed in 12.6% of dogs during follow-up.
    • Early gonadectomy (before 1 year) significantly increased bone sarcoma risk in both males (RR=3.8) and females (RR=3.1).
    • A significant inverse dose-response relationship observed between duration of gonadal exposure and bone sarcoma incidence.

    Conclusions:

    • Early gonadectomy in Rottweilers is strongly associated with an increased lifetime risk of bone sarcoma.
    • Rottweiler dogs with early gonadectomy provide a valuable model for studying bone sarcoma etiology.
    • Further research can explore gene:environment interactions and potential interventions for bone sarcoma prevention.